A kind of lithium extraction electrode and preparation method thereof
A lithium electrode and electrode powder technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of low lithium selectivity and low electrode current density, and achieve the effects of improved extraction rate, low cost, and simple process
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Embodiment 1
[0040] Preparation of lithium iron phosphate electrode: (1) Put the lithium iron phosphate active material into 5g / L dopamine salt solution according to the solid-liquid mass ratio of 1:5, control the reaction temperature to 20°C, the pH value of the solution to 8.5, and stir the reaction for 15 hours. After the reaction is completed, filter and wash, and the filter residue is dried at 100 ° C; (2) polyethylene glycol and PVDF are added to N-methylpyrrolidone solvent, and vacuum mechanical stirring is performed until all dissolved; (3) polydopamine-modified Lithium iron phosphate powder, acetylene black, solid NaCl as a pore-forming agent, and short carbon fibers with a length of 2 mm were added in proportion to the N-methylpyrrolidone glue solution, and mechanically stirred in vacuum for 6 hours to obtain a uniformly dispersed electrode slurry; (4) The obtained The electrode slurry is uniformly coated on a titanium mesh with a thickness of 1 mm and an area of 40 cm × 50 cm, ...
Embodiment 2
[0054] Preparation of lithium iron phosphate electrode: (1) Put the lithium iron phosphate active material into 2g / L dopamine salt solution according to the solid-liquid mass ratio of 1:5, control the reaction temperature to 25°C, the pH value of the solution to 9, and stir the reaction for 20 hours. After the reaction is completed, filter and wash, and the filter residue is dried at 100 °C; (2) Polyethylene glycol, chitosan and PVDF are added to N-methylpyrrolidone solvent and mechanically stirred until they are completely dissolved; (3) Polydopamine is modified The lithium iron phosphate powder, conductive agent acetylene black, pore-forming agent solid KCl, and short carbon fibers with a length of 1 mm were added to the N-methylpyrrolidone glue solution in proportion, and vacuum mechanically stirred for 6 hours to obtain a uniformly dispersed slurry; (4 ) The obtained slurry is uniformly coated on 1mm thick, on the carbon fiber cloth of 40cm×50cm area, and the coating densit...
Embodiment 3
[0058] Preparation of lithium manganate electrode: (1) Put the lithium manganate active material into 4g / L dopamine salt solution according to the solid-liquid mass ratio of 1:5, control the reaction temperature to 20°C and the pH value of the solution to 9.5, and stir the reaction for 10 hours. After the reaction is completed, filter and wash, and the filter residue is dried at 100° C.; (2) Polyethylene glycol, polyvinyl alcohol and PVDF are added to N-methylpyrrolidone solvent and mechanically stirred until they are completely dissolved; (3) Polydopamine is modified Lithium manganate powder, acetylene black, pore-forming agent solid NaCl, and short carbon fibers with a length of 2.5 mm were added in proportion to the N-methylpyrrolidone glue solution, and vacuum mechanically stirred for 8 hours to obtain a uniformly dispersed slurry; (4) The obtained slurry is uniformly coated on a carbon fiber cloth with a thickness of 1 mm and an area of 40 cm × 50 cm, and the coating den...
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